You've definitely got potential. You're young, and have plenty of time to improve and really perfect your sound. Definitely try and find time to devote to a singing practice, be it lessons with a teacher, or a home DVD/CD type deal. You can't improve without practice. You do have some pitch issues, and as is normal for pretty much everyone, you're weaker the higher you go, but this can be corrected through training. Keep at it, you've got a good tone and are marketable, so if that's your desire, all it'll take is some hard work. Good luck, Man.